
package design.onekey.util;

import javax.servlet.http.HttpServletRequest;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * 自定义访问对象工具类
 *
 * 获取对象的IP地址等信息
 * @author X-rapido
 *
 */
public class CusAccessObjectUtil {

  /**
   * 获取用户真实IP地址，不使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址,
   *
   * 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？
   * 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。
   *
   * 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130,
   * 192.168.1.100
   *
   * 用户真实IP为： 192.168.1.110
   *
   * @param request
   * @return
   */
	public static String getIpAddress(HttpServletRequest request) {
		String ip = "";
		try {
			ip = request.getHeader("x-forwarded-for");
			if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
				ip = request.getHeader("Proxy-Client-IP");
			}
			if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
				ip = request.getHeader("WL-Proxy-Client-IP");
			}
			if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
				ip = request.getHeader("HTTP_CLIENT_IP");
			}
			if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
				ip = request.getHeader("HTTP_X_FORWARDED_FOR");
			}
			if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
				ip = request.getRemoteAddr();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}

		return ip;
	}

  /**
	 * @Title: getHostAddress
	 * @Description: 获取当前机器的ip地址
	 * @return
	 * @author caiyang
	 * @date 2020-11-25 10:23:22
	 */
	public static String getHostAddress() {
		String result = "";
		InetAddress ip4 = null;
		try {
			ip4 = Inet4Address.getLocalHost();
			result = ip4.getHostAddress();
		} catch (UnknownHostException e) {
			e.printStackTrace();
		}
		 return result;
	  }

}
